How do I export a model to .obj format?
If you wanted to export a simple model such as:



as a .obj file that is compatible with OpenGL or another 3D graphics platform then all you do is go to export:



Look for the export options in the toolbar in the bottom left corner. This will allow you to choose the specifications for the output file:



The options I am using above are compatible with OpenGL ES, you may have to adjust your properties accordingly. This type of export will produce a .obj file (geometry file) and a .mtl file (materials and textures file).